The Alpina Startimer Pilot Heritage Chronograph AL-727SS4H6 is a stunning Swiss Made mechanical (automatic) mono-pusher chronograph . This means the chronograph is entirely operated by a single crown (at 2 o'clock). Under the hood you'll find the Alpina Cal. AL-727.The watch is very well balanced with its 42mm diameter and has a beautiful, stylish presence on your wrist. The details are very refined, as you're used to with Alpina. Of course with 100m water resistance, sapphire glass and a high quality leather strap.